[Bug 67454] After suspend/resume, screen is black for all but the highest levels with i915 driver on MacBook Air 6,2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67454

--- Comment #72 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to comment #64)
> The backlight rework doesn't fix the problem so reopening. To clarify,
> booting into BIOS mode instead of UEFI fixes the problem.

An idea, please attach /sys/kernel/debug/dri/0/i915_opregion for both BIOS mode
and UEFI boot.

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